Top definition
When you wank inside your pants and don't wash your penis, you penis starts smelling real bad. That smell, is called the wump wump smell.
Man. I couldn't get that wump wumpoff Me dick for 3 days.
via giphy
by Ary130904 March 29, 2018
Get the mug
Get a wump wump mug for your bunkmate Beatrix.